JPH06276114A - Reception waiting method - Google Patents

Abstract

PURPOSE:To obtain a reception waiting method which does not generate interruption of state of speech and can save power consumption at the time of waiting. CONSTITUTION:A receiver is provided with a reception signal strength detection circuit RSSI circuit 8 detecting a reception signal (b) excepting for sound demodulation systems 5 to 7 so as to save power consumption by stopping the operation of the demodulation systems 5 to 7 at the time of waiting. At the time of reception, the RSSI circuit 8 detecting the reception signal (b) quickly makes the demodulation systems 5 to 7 of the reception signal (b) operate so a to eliminate the interruption of state of speech of the reception signal (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver standby method.

[0002]

2. Description of the Related Art Conventionally, the method shown in FIG. 3 has been used as a method for reducing power consumption during reception standby. That is, the signal from the antenna is high frequency amplified,
It is received through the frequency conversion circuit 1, the intermediate frequency amplification circuit 2 and the demodulation circuit 3. At this time, in the standby mode, the power consumption of the intermediate frequency amplification circuit 2 and the demodulation circuit 3 is turned on / off at a constant cycle by the control unit 4 as shown in FIG.

[0003]

However, according to this conventional method, as shown in FIG. 4, when the power of the signal a from the control unit 4 is turned off and the received signal b comes when the power is turned off, the power is turned on at the signal a. As shown in the graph b of FIG. 4, the received signal b cannot be demodulated until it is turned on, which causes a short cut. The present invention solves this drawback and provides a reception waiting method that can further reduce power consumption during standby.

[0004]

RSS for detecting a received signal b separately from a voice demodulation system 5, 6, 7 in a receiver
An I circuit 8 is provided.

[0005]

In the standby mode, the operation of the demodulation systems 5, 6 and 7 is stopped to save power consumption, and at the time of reception, the RSSI detection section 8 for detecting the reception signal b promptly demodulates the reception signal b. 7 is operated to eliminate the cutoff of the received signal b.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention includes a high frequency amplification / frequency conversion circuit 5, an intermediate frequency amplification circuit 6, a demodulation circuit 7 as shown in FIG.
RSSI detector 8 (received signal strength detection circuit-Received S
ignal Strength Indicator) and its RSSI detector 8
And a control section 9 which is operated by a signal c from

Next, the operation of this device will be described. The received signal b input from the antenna is received via the high frequency amplification / frequency conversion circuit 5, the intermediate frequency amplification circuit 6 and the demodulation circuit 7. On the other hand, the received signal b that has passed through the high frequency amplification and frequency conversion circuit 5 is also guided to the RSSI detection unit 8 of the circuit that detects the received signal b. The presence / absence of the reception signal b is determined by this portion, and when the reception signal b is present, the control unit 9 is operated by the signal c, and the control unit 9 uses the signal d to output the intermediate frequency amplifier circuit 6, 6.
The power of the demodulation circuit 7 is turned on. Therefore, it is possible to immediately receive the reception signal b as shown by the graph b in FIG. 2 and prevent the break of the talk.

That is, during standby, the RSSI detection section 8 detects the absence of the received signal b and turns off the power supplies of the intermediate frequency amplification circuit 6 and the demodulation circuit 7, thereby saving power consumption. When the reception signal b is received, it is detected by the RSSI detection section 8 as shown in FIG. 2, and the control section 9 immediately turns on the power supply of the intermediate frequency amplification circuit 6 and the demodulation circuit 7 by the signal c. As a result, it is possible to solve the disconnection of the reception signal b at the time of shifting from reception standby to reception.

[0009]

As described above, according to the present invention, it is possible to eliminate the cutoff of the reception signal b at the time of shifting from the reception of the reception signal to the reception. Further, when there is no received signal b, the power of the intermediate frequency amplifier circuit 6 and the demodulator circuit 7 is always turned off, so that the power consumption is further saved. Is possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a graph showing an operation sequence of one embodiment of the present invention, in which a shows an output of the control unit 9 and b shows an output of a reception signal.

FIG. 3 is a block section showing a configuration of a conventional example.

FIG. 4 is a graph showing an operation sequence of the conventional example,
Reference symbol a indicates an output of the control unit 4, and reference symbol b indicates a received signal.

[Explanation of symbols]

 5 high frequency amplification and frequency conversion circuit 6 intermediate frequency amplification circuit 7 demodulation circuit 8 RSSI detection part b received signal

Claims (1)

[Claims] 1. A receiver is provided with an RSSI circuit for detecting a reception signal separately from a voice demodulation system, the operation of the demodulation system is stopped during standby to save power consumption, and the reception signal is detected during reception. A reception waiting method characterized in that the RSSI detecting section promptly operates a demodulation system of a received signal to eliminate a break in the received signal.